package lesson01;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * @Auther: xiaofei
 * @Date: 2021/6/28 - 06 - 28 - 15:17
 * @Description: lesson01
 * @version: 1.0
 */
public class TCPServerDemo02 {
    //这是一个main方法，是程序的入口：
    public static void main(String[] args) throws Exception {
        // 1.创建服务
        ServerSocket serverSocket = new ServerSocket(9000);
        // 2.监听客户端的连接
        Socket socket = serverSocket.accept();//阻塞式监听，会一直等待客户端连接
        // 3.获取输入流
        InputStream is = socket.getInputStream();
        // 4.文件输出
        FileOutputStream fos = new FileOutputStream(new File("receive.png"));
        byte[] buffer = new byte[1024];
        int len;
        while((len = is.read(buffer))!= -1){
            fos.write(buffer,0,len);
        }
        //通知客户端我接受完毕了，可以断开
        OutputStream os = socket.getOutputStream();
        os.write("我接受完毕了，可以断开了".getBytes());

        // 5.关闭资源
        fos.close();
        is.close();
        socket.close();
        serverSocket.close();
    }
}
